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Cottonseed Solvent Extraction Plant

GOYUM GROUP is a prominent manufacturer and exporter of Cottonseed Solvent Extraction Plant on Turnkey Basis with our manufacturing facilities in Ludhiana ( Punjab ), India. We offer Cottonseed Solvent Extraction Plant in different capacities starting from 50 Tons Per Day.

Cottonseed Solvent Extraction Plant

The crushing of cotton seed to produce oil was documented in very old Hindu medical books. Later years a Chinese cotton seed oil production was noticed with wedge systems. Cotton seed oil is very dominant vegetable oil in United States of America for almost 100 years. It is highly dominated and principal raw material for vegetable oil products.

Crushing and refining of cotton seed and using oil in cooking oil / vegetable oil / salad oil made the cotton seed processing industry to become profitable and more ways are explored to produce good quality cotton seed oil. Along with this the shortage of vegetable oils world given a boost for well utilization of cotton seed oil extraction and refining. Although there a lot of turmoil in vegetable oil industry cotton seed oil occupies its significant position provides 10% of world oil production even today.

Even Palm oil and Soya oil are dominated in the world market, still cotton seed oil plays a vital roles for its unique properties and modern refining methods keeps the oil at the same line of other liquid oil like Ground Nut, Sunflower, Soya etc.

Botanically cotton fruits or cotton balls contains seeds in side. The ginning industry removes the complete cotton from the balls leaving seeds with some cotton called lint on the surface of the seeds.

The other way cotton seed is the by product of cotton ginning industry.

cottonseed solvent extraction plant process flow chart

Cotton Seed Oil Extraction

As explained in earlier the cotton seed oil extraction started from Medicinal applications to wedge press to hydraulic press then to screw press and followed by solvent extraction process.

Like all other oil seeds cotton seed extraction also follows some steps involved to produce quality cotton seed oil and meal.

General specifications of seeds:

Moisture 6-7%
Impurities 2-3%
Lints 10% max
Hulls 36 – 38%
Oil Content 15-20%
H.O.S. 26 – 30%
Protein 16-20%

First Method : Direct Screw Press

  • Cleaning
  • Magnetic Separation
  • Oil Pressing
  • Cooling
  • Sizing

Second Method : Full Press

  • Cleaning
  • Magnetic Separation
  • De-linting
  • Decorticating
  • Seed Cracking
  • Dehulling
  • Cooking/Conditioning
  • Oil Pressing
  • Cooling
  • Sizing

Third Method : Pre Pressing

  • Cleaning
  • Magnetic Separation
  • De-linting
  • Decorticating
  • Seed Cracking
  • Dehulling
  • Cooking/Conditioning
  • Flaking
  • Pre-Pressing

Fourth Method : Expender Process

  • Cleaning
  • Magnetic Separation
  • De-linting
  • Decorticating
  • Seed Cracking
  • Dehulling
  • Cooking/Conditioning
  • Flaking
  • Expander System
  • Drier Cooler

Cotton Seed Cleaning

The cotton seed received from ginning mill are cleaned with vibratory cleaners or rotary drum cleaners to remove impurities like dust, some fiber and solid content if any.

Magnetic Separation

The cleaned cottonseeds passed through either rotary drum magnet of stationary permanent magnet to remove all iron contamination and iron particles.

Cotton Seed Cracking

The delinted seed are passed through the seed crackers where the black seed properly cracked into 2 or 3 pieces.

Cotton Seed Delinting

The cotton seed contains 6% to 8% of Lint which will be removed with the help of Delinters and the process called delinting. The cotton seed passed through the delinters will remove upto 4% of the lint on the top of the seed and convert the seed to black seed. The lint removed is collected and pressed to BHELs and used in various napkin making industry and also in surgical cotton industry.

Cotton Seed Dehulling

The cracked seed pieces are sent through the de hullers where the hulls are to be removed from the seed which more than 30% of the cracked seed. The cracked seed rubbed through the rubber rollers for better separation of hulls and allow to shakers. The hulls are separated and meat (kernels) are separated. The hulls will be cleared again to collect the meat particles. The meat particles cleaned again to remove if any small quantity of hulls present.

This will help to collect the meat with oil content upto 30% to 36% based on the quality of the seed.

Cooking / Conditioning

The cleaned seed feed to the cooker conditioner where the seeds are tempered by giving temperature through jacketed steam and also little quantity of live steam.

Flaking

The cooked and conditioned seed feed to flaker to maintain a thick ness of the flakes 0.35mm with help of chilled cast iron rolls fitted with hydraulic system. The materials are pressed and discharged to the next step.

First Method : Direct Screw Pressing

The small units and some big units earlier processing the cotton seed as pressing in screw press as it is without doing de-linting, de-hulling. The oil could extracted by screw press as direct press as a conventional process where cake contains 7% oil will be send to solvent extraction plant.

Advantages

  • Mini scale could be started

Disadvantages

  • Dark colored oil produced
  • High chemical consumption during the refining
  • Low protein meal
  • Lint and hulls will lost in the cake
  • High fiber effects the animal health

Second Method : Full Press

The conditioned seed fed into the screw press where almost 10% of the oil will be drained out leaving 6% to 7% oil in the cake. This cake will be discharged at temperature of 70°C and in the form big pieces with a thick ness of 8mm to 10mm.

Third Method: Pre-Press

The conditioned cotton seed meat transfer to the pre pressing screw press where more than 50% of the oil will be drained out and remaining 18% oil cake will be transferred to Solvent Extraction Plant.

Fourth Method : Expander System

This is the system used to process the flakes directly in the solvent extraction process. The flakes are conditioned to raise the temperature upto 85°C in the conditioned fitted above the expander, and the conditioned flakes passed through the expander fitted with squeez o matic arrangement where the flakes are squeezed to release 10% to 12% of oil and flakes will be converted to high porosity collets either with die plates or hydraulic system. These collets discharged from expander at 95°C to 100°C with 10% to 12% moisture.

Cooling

The cotton seed expelled cake is cooled to 55°C as the solvent extraction plant could not take cake above 55°C.

Sizing

The cooled cake will be passed through the cake sizing machine where the cake will be broken into 2 inch to 3 inch size pieces to improve the extraction rate. This small size will help to minimize the voids, increase the area of percolation. This will be feed to the extraction plant with the help of transfer conveyor.

Drier Cooler

The acceptable temperature for solvent extraction is 55°C and moisture around 8% to 9%. The collets discharged from expander system passed through the drier cooler where there moisture and temperature are reduced to required level and suitable for solvent extraction and transferred to the solvent extraction plant.

Solvent Extraction

The cotton seed cake solvent extracted or pre-pressed cake or full pressed cake or expanded collets. The pre-pressed cake / expanded collets / fully pressed cake from preparatory section is carried by Redler Conveyor and fed to Extractor Either through rotary valve or Plug O Seal to extractor feed hopper incorporated with high and low level arrangement to ensure proper level of material filled in the hope and seal for the system. The material through the intake hopper moves on the endless band conveyor chain of moving deep bed extractor and the Hexane is sprayed counter currently over the moving bed material. The solvent percolates n penetrates through the bed and dissolves oil with it. The solvent oil mixture is called as Miscella. Miscella from last hoper will be transferred to Miscella holding tank through Miscella filter or hydro cyclones fixed above Extractor. The de oiled seed material with solvent is discharged from extractor discharge hopper and is transferred to desolventisor toaster through leak proof sealed solvent tight conveyor.

Pre-Pressed Cake as FEED:

Feed Material Cotton Seed Cake with less than 0.5% fines
Moisture 8%-9 %
Oil Content 18% – 20%

Full Pressed Cake as FEED

Feed Material Cotton Seed Cake with less than 0.5% fines
Moisture 8%-9 %
Oil Content 7% – 8%

Expanded Collets as FEED

Feed Material Cottonseed collets with less than 0.5% fines
Moisture 8%-9 %
Oil Content 20% – 25%

Meal Conditioning and Bagging

The cottonseed oiled meal obtained from the DT discharged at 110°C will be cooled to 10°C above the ambient temperature. This cooled meal contains some quantity of lumps around 10% to 15% based on the operation and quality of steam. These lumps are sieved out and grinded to the specific size of sieve. This is the final product which called de oiled cotton meal. This will be bagged in 50 to 75 kg through an automatic bagging machine.

De-oiled Cake after Extraction De-oiled Cottonseed Cake
Residual Oil 0.6 – 0.8%
Moisture 9 – 10%
Hexane 600 ppm
Protein 40 – 42%
Output Oil – Solvent Extracted Oil Cottonseed oil
MIV 0.20%
Filterable impurities 0.15%
FFA (depends on feed quality) 2%
Peroxide meq02/Kg 10
Phosphatides 1.50%
Waxes ppm Nil
Unsaponifiable 0.50%
Flash point 125°C

*** In case of whole cotton seed is used without de linting and de hulling the protein content in the cake will be 20% to 26% based on the input seed analysis report.

Cottonseed Solvent Extraction Plant Process

  • Meal Desolventization
  • Miscella Distillation System
  • Condensation and Solvent Recovery
  • Recuperation (Absorption and Desorption) Unit

Please Click Here to know the above process in details about Cottonseed Solvent Extraction Plant to extract cottonseed oil.

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